State Route 9 over San Lorenzo River
FairSanta Cruz County, California · 05-SCR-009-9.71 · Structure no. 36 0049
- Built
- 1936
- 89 years old, rebuilt 1987
- Condition
- Fair
- inspected June 2024
- Type
- Stringer/Multi-beam or Girder
- Prestressed Concrete
- Length
- 173 ft
- 1 main span
- Daily traffic
- 21,100
- 2009 count
- Owner
- State
- State Highway Agency
About this bridge
State Route 9 over San Lorenzo River is a prestressed concrete stringer/multi-beam or girder carrying State Route 9 over San Lorenzo River in Santa Cruz County, California. It was built in 1936 and reconstructed in 1987, so it is 89 years old, older than the California average of 54.8 years.
The most recent inspection reported to the Federal Highway Administration rates it in fair condition with a lowest component rating of 5 out of 9. The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound.
It carries about 21,100 vehicles a day, roughly 4% of them trucks, projected to reach 9,717 by 2046. The structure is 173 ft (52.7 m) long and 59 ft wide. If it were closed, the detour would be 14.9 mi (24 km).
Location
Open in Google MapsCondition and inspection
The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound.
| Component | Rating | Meaning |
|---|---|---|
| Deck | 5 Fair | All primary structural elements are sound but may have minor section loss, cracking, spalling or scour. |
| Superstructure | 7 Good | Some minor problems. |
| Substructure | 7 Good | Some minor problems. |
| Channel and channel protection | 7 Good | Some minor problems. |
Structure
Traffic and service
Ownership and planned work
Frequently asked questions
When was State Route 9 over San Lorenzo River built?
It was built in 1936, making it 89 years old in 2025. It was reconstructed in 1987.
What condition is State Route 9 over San Lorenzo River in?
The National Bridge Inventory rates it in fair condition. The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound. The last reported inspection was in June 2024.
How much traffic does State Route 9 over San Lorenzo River carry?
About 21,100 vehicles per day (2009 count), of which roughly 4% are trucks.
How long is State Route 9 over San Lorenzo River?
The structure is 173 ft (52.7 m) long with a longest span of 100 ft (30.6 m) and a deck 59 ft wide.
Who owns State Route 9 over San Lorenzo River?
It is owned by the State Highway Agency.